{
  "date": "2026-11-14",
  "source": {
    "name": "LibriSpeech test-clean",
    "url": "https://www.openslr.org/12",
    "archive": "https://www.openslr.org/resources/12/test-clean.tar.gz",
    "license": "CC BY 4.0",
    "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
    "attribution": "Vassil Panayotov, Guoguo Chen, Daniel Povey and Sanjeev Khudanpur, LibriSpeech, ICASSP 2015"
  },
  "method": {
    "scope": "Six Whisper variants on OpenAI, Groq and Cloudflare through Speechall",
    "uniqueClips": 3,
    "uniqueSpeakers": 3,
    "repeatsPerClip": 3,
    "totalSourceAudioSeconds": 29.564999999999998,
    "selection": "First 5\u201320-second clip encountered for each of the first three speakers in archive order; selected before requests",
    "reference": "Dataset-supplied transcripts; no additional human correction",
    "conversion": "FLAC to 16-bit PCM WAV with ffmpeg; no resampling or channel changes",
    "client": {
      "platform": "darwin",
      "architecture": "arm64",
      "node": "v22.23.1",
      "network": "Uncontrolled local workstation network; provider processing regions unknown"
    },
    "order": "Fixed clip order; six models in the listed order, rotated left by 0, 2 and 4 positions on the three repeats",
    "scorerSha256": "a59f3902f3c4c87c32b1cac406643072b226afc7ff54eb18a8130493a9f99b38",
    "normalization": "NFKC, lowercase, replace punctuation/symbols with spaces, whitespace tokens (v1)",
    "settings": {
      "language": "en",
      "output_format": "json",
      "punctuation": true,
      "diarization": false
    },
    "cost": "Catalog snapshot estimates only; actual charges unknown",
    "latency": "Complete HTTP response including transfer; sequential requests; no warm-up discarded",
    "limits": [
      "Three clean read-English clips are not representative of conversational or multilingual workloads.",
      "Public benchmark data may overlap model training data.",
      "Repeated requests are not independent recordings.",
      "Models differ in size, version and deployment; this is not an identical-weights hardware comparison."
    ],
    "requests": 54,
    "models": [
      "openai.whisper-1",
      "groq.whisper-large-v3",
      "groq.whisper-large-v3-turbo",
      "cloudflare.whisper",
      "cloudflare.whisper-large-v3-turbo",
      "cloudflare.whisper-tiny-en"
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    "speedMetrics": {
      "speedup": "sum of audio seconds across requests / sum of measured request seconds; higher is faster",
      "realTimeFactor": "sum of measured request seconds / sum of audio seconds; lower is faster",
      "perClip": "audio seconds / median turnaround of three requests for that clip",
      "timingScope": "Upload through complete HTTP response, including network and service processing; excludes gaps between requests"
    }
  },
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      "durationSeconds": 5.85,
      "archivePath": "LibriSpeech/test-clean/6930/75918/6930-75918-0006.flac",
      "sourceSha256": "4bed112ebfdba58ec061abd3fe013f89946863e9c51e8a83b50a5eb7afb9ce65",
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      "archivePath": "LibriSpeech/test-clean/1320/122617/1320-122617-0003.flac",
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      "clip": "5639-40744-0032",
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      "archivePath": "LibriSpeech/test-clean/5639/40744/5639-40744-0032.flac",
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